Rotary knob



FIG. 1 is a top view of a rotary knob according to the present invention;

FIG. 2 is a bottom view of the rotary knob of FIG. 1;

FIG. 3 is a first side view of the rotary knob of FIG. 1, the opposite side view being symmetric therewith; and,

FIG. 4 is a second side view, rotated ninety degrees from the first side view of the rotary knob of FIG. 1, the opposite side being symmetric therewith.

The broken lines shown in FIG. 2 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for the rotary knob, as shown and described. 